Premium brand-name PQQ as BioPQQ®. Vegetarian tablets supply 20 mg per serving. Premium BioPQQ® brand PQQ. Vitamin-like nutrient with antioxidant properties*. 20 mg per serving. Vegetarian tablets. What is PQQ® (pyrroloquinoline quinone)? . Pyrroloquinoline quinone (PQQ) is a vitamin-like substance found naturally in plant foods including fruits vegetables teas legumes and fermented beans as well as in eggs some meat and dairy products and in human milk. . PQQ is a known antioxidant that’s currently under investigation for its role in cellular mitochondrial health.*. . About Vitacost. Vitacost nutritional products are manufactured to high standards of quality efficacy and safety. Each Vitacost product meets or exceeds the standards and requirements set forth in the FDA’s Code of Federal Regulation (21 CFR 111) Current Good Manufacturing Practices (cGMP). . . *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose treat cure or prevent any disease.